Little is known of the prevalence of Moderate Intellectual Disability and Borderline Intellectual Functioning (MID/BIF) in the chronic and serious mentally ill (SMI) patients. A recent study on two admission wards for general psychiatry in the Netherlands results showed 43.8% of the patients to be at risk of MID/BIF (Nieuwenhuis et al. 2017), as assessed with the Screener for Intelligence Intelligence Learning Disabilities (SCIL, Kaal, Nijman & Moonen, 2015). From the scarce literature we know people with MID/BIF living at home have more serious psychiatric problems those without MBID (Hasiotis, et al. 2008, Wieland et al, 2014). Several studies also show people with MID/BIF are more at risk to traumatic life experiences. Violence, sexual and physical abuse against people with a disability is widespread, especially to people with ID (Hatton and Emmerson 2004, Focht-New et al, 2008, Vadysinge A.N. et al, 2017, Lan-Ping Lin et al. 2009 ).